George Clooney
Amal Alamuddin wants George Clooney to get into shape before the Oscars on 22 February.Getty

American actor and filmmaker George Clooney has reportedly been put on a strict diet by his wife Amal Alamuddin.

According to Daily Star, the 36-year-old British-Lebanese lawyer has started a healthy eating regime for the 53-year-old Gravity star, who has piled on more than a stone since they tied the knot in September, in Venice, Italy.

"Amal told me there are five rules for George's new eating regime and healthy lifestyle that should get him back in shape as quickly as ­possible," a source said.

Alamuddin is hoping Clooney can shed 15 pounds before the Academy Awards, which is scheduled to take place on 22 February.

"George is a pretty disciplined guy on set but, although Amal's new eating rules seem straightforward, he's going to find it tough because he loves Mexican food and even binges on the fast food variety several times a week in LA," the insider added.

"Rande [Gerber] and Cindy [Crawford] have promised Amal they'll do everything they can to help her lick him back into some sort of shape ­before the Academy Awards," another friend said, adding, "But it's going to be tough as there's nothing George likes to wolf down more than a couple of spicy fish tacos followed by a shot or two of his own tequila."